- Obituary (1351 Hits)
- Obscurity (2332 Hits)
- Officium Triste (1014 Hits)
- Omission (914 Hits)
- Onheil (310 Hits)
- Onkel Tom Angelripper (613 Hits)
- Onslaught (1093 Hits)
- Oppressus (1167 Hits)
- Orae (1050 Hits)
- Orden Ogan (983 Hits)
- Out For Blood (506 Hits)
- Outrage (JPN) (43 Hits)
- Overkill (963 Hits)
- Ozzy Osbourne (1106 Hits)